{"id":49093,"date":"2019-11-14T11:14:02","date_gmt":"2019-11-14T10:14:02","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-a-espessura-da-camada-limite-definicao\/"},"modified":"2020-02-01T17:41:57","modified_gmt":"2020-02-01T16:41:57","slug":"o-que-e-a-espessura-da-camada-limite-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/","title":{"rendered":"O que \u00e9 a espessura da camada limite – Defini\u00e7\u00e3o"},"content":{"rendered":"
\n
Definimos a espessura da camada limite como a dist\u00e2ncia da parede at\u00e9 o ponto em que a velocidade \u00e9 99% da velocidade do “fluxo livre”.\u00a0Camada limite.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n
<\/div>\n
\n
\n
<\/div>\n

Espessura da camada limite<\/h2>\n

Definimos a\u00a0espessura<\/strong>\u00a0da camada limite como a dist\u00e2ncia da parede at\u00e9 o ponto em que a velocidade \u00e9 99% da velocidade do “fluxo livre”.\u00a0Para\u00a0camadas de limite laminar<\/strong>\u00a0sobre uma placa plana, a\u00a0solu\u00e7\u00e3o<\/strong>\u00a0\u00a0de\u00a0Blasius<\/strong>\u00a0das equa\u00e7\u00f5es que governam o fluxo fornece:<\/p>\n

\"Espessura<\/a><\/p>\n

onde\u00a0Re\u00a0x<\/sub><\/strong>\u00a0\u00a0\u00e9 o n\u00famero de Reynolds com base no comprimento da placa.<\/p>\n

Para um\u00a0fluxo turbulento,<\/strong>\u00a0a espessura da camada limite \u00e9 dada por:<\/p>\n

\"Espessura<\/a><\/p>\n

Esta equa\u00e7\u00e3o foi derivada com v\u00e1rias suposi\u00e7\u00f5es.\u00a0A f\u00f3rmula de espessura da camada limite turbulenta pressup\u00f5e que o fluxo seja turbulento desde o in\u00edcio da camada limite.<\/p>\n

\"Camada<\/a><\/p>\n

<\/div>\n<\/div>\n<\/div>\n
\n
\n
<\/div>\n

Exemplo: espessura da camada limite<\/h2>\n

Considere um fluxo de \u00e1gua (20 \u00b0 C) em v = \u00a0\u00a00,1 m \/ s<\/strong>\u00a0ap\u00f3s uma placa plana de 1 m de comprimento.\u00a0Calcule a espessura da camada limite no meio da placa.\u00a0Assume-se que a viscosidade cinem\u00e1tica de \u00e1gua a 20 \u00b0 C \u00e9 igual a\u00a01 x 10\u00a0-6<\/sup>\u00a0m\u00a02<\/sup>\u00a0\/ s<\/strong>\u00a0.<\/p>\n

O n\u00famero de Reynolds<\/strong>\u00a0no meio da placa \u00e9 igual a:<\/p>\n

Re\u00a0L \/ 2<\/sub>\u00a0= 0,1 [m \/ s] x 0,5 [m] \/ 1 \u00d7 10\u00a0-6<\/sup>\u00a0[m\u00a02<\/sup>\u00a0\/ s] =\u00a050 000<\/strong><\/p>\n

Isso satisfaz as condi\u00e7\u00f5es laminares.\u00a0A espessura da camada limite \u00e9, portanto, igual a:<\/p>\n

\u03b4 \u2248 5,0 x 0,5 \/ (50 000)\u00a0<\/span>\u00bd<\/span><\/sup>\u00a0=\u00a0<\/span>0,011 m<\/span><\/strong><\/p>\n

 <\/p>\n<\/div>\n<\/div>\n

……………………………………………………………………………………………………………………………….<\/p>\n

Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n","protected":false},"excerpt":{"rendered":"

Definimos a espessura da camada limite como a dist\u00e2ncia da parede at\u00e9 o ponto em que a velocidade \u00e9 99% da velocidade do “fluxo livre”.\u00a0Camada limite.\u00a0Engenharia T\u00e9rmica Espessura da camada limite Definimos a\u00a0espessura\u00a0da camada limite como a dist\u00e2ncia da parede at\u00e9 o ponto em que a velocidade \u00e9 99% da velocidade do “fluxo livre”.\u00a0Para\u00a0camadas de … Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"\nO que \u00e9 a espessura da camada limite - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Definimos a espessura da camada limite como a dist\u00e2ncia da parede at\u00e9 o ponto em que a velocidade \u00e9 99% da velocidade do "fluxo livre". Camada limite. Engenharia T\u00e9rmica\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O que \u00e9 a espessura da camada limite - Defini\u00e7\u00e3o\" \/>\n<meta property=\"og:description\" content=\"Definimos a espessura da camada limite como a dist\u00e2ncia da parede at\u00e9 o ponto em que a velocidade \u00e9 99% da velocidade do "fluxo livre". Camada limite. Engenharia T\u00e9rmica\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/\" \/>\n<meta property=\"og:site_name\" content=\"Thermal Engineering\" \/>\n<meta property=\"article:published_time\" content=\"2019-11-14T10:14:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-02-01T16:41:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boundary-Layer-Thickness-laminar.png\" \/>\n<meta name=\"twitter:card\" content=\"summary\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\">\n\t<meta name=\"twitter:data1\" content=\"Nick Connor\">\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\">\n\t<meta name=\"twitter:data2\" content=\"1 minuto\">\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\",\"url\":\"https:\/\/www.thermal-engineering.org\/fr\/\",\"name\":\"Thermal Engineering\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.thermal-engineering.org\/fr\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-BR\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/#primaryimage\",\"inLanguage\":\"pt-BR\",\"url\":\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boundary-Layer-Thickness-laminar.png\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/#webpage\",\"url\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/\",\"name\":\"O que \\u00e9 a espessura da camada limite - Defini\\u00e7\\u00e3o\",\"isPartOf\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/#primaryimage\"},\"datePublished\":\"2019-11-14T10:14:02+00:00\",\"dateModified\":\"2020-02-01T16:41:57+00:00\",\"author\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"Definimos a espessura da camada limite como a dist\\u00e2ncia da parede at\\u00e9 o ponto em que a velocidade \\u00e9 99% da velocidade do \\\"fluxo livre\\\". Camada limite. Engenharia T\\u00e9rmica\",\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-espessura-da-camada-limite-definicao\/\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\",\"name\":\"Nick Connor\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#personlogo\",\"inLanguage\":\"pt-BR\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/84c0dec310b44b65da29dc9df6925239?s=96&d=mm&r=g\",\"caption\":\"Nick Connor\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","_links":{"self":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/posts\/49093"}],"collection":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/comments?post=49093"}],"version-history":[{"count":0,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/posts\/49093\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/media?parent=49093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/categories?post=49093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/pt-br\/wp-json\/wp\/v2\/tags?post=49093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}